CN1005847B - Resin composition for porous film and film prepared therefrom - Google Patents

Resin composition for porous film and film prepared therefrom Download PDF

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Publication number
CN1005847B
CN1005847B CN86108393.8A CN86108393A CN1005847B CN 1005847 B CN1005847 B CN 1005847B CN 86108393 A CN86108393 A CN 86108393A CN 1005847 B CN1005847 B CN 1005847B
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China
Prior art keywords
film
barium sulfate
porous
weight
parts
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Expired
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CN86108393.8A
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Chinese (zh)
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CN86108393A (en
Inventor
松村秀司
伊藤道康
辻从一
铃木久利
伊藤省一
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Mitsui Toatsu Chemicals Inc
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Mitsui Toatsu Chemicals Inc
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Publication of CN86108393A publication Critical patent/CN86108393A/en
Publication of CN1005847B publication Critical patent/CN1005847B/en
Expired legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/73—Processes of stretching

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

A porous film having a good water vapor permeability is obtained with a high productivity by melting a resin composition comprising 100 parts by weight of a polyolefin resin and 50 to 500 parts by weight of barium sulfate having an electric conductivity of 250 us/cm or less in terms of the electric conductivity of a supernatant formed when the barium sulfate is added to water, and a particle size of 0.1 to 7 um, making the melt into a film and stretching the film to 2.5 to 14 times the original area at least in the uniaxial direction.

Description

The resin combination of porous-film and the film of making by it
The present invention relates to a kind ofly can be processed into the resin combination of porous-film and a kind of porous-film of being made by it, this film has good water vapour permeability and ventilation property, and has good water-repellancy.
So far, porous-film is to be filled in the polyolefin resin with various nonmiscibility materials, the composition of gained processing film forming, and stretch to form and (see the clear 53-12542/1978 of Japanese patent laid-open publication gazette, United States Patent (USP) U.S.4,347,844, and the clear 57-59727/1982 of Japanese Patent Application Publication).
But the sort of film that makes according to these methods has some shortcomings like this, bad mechanical strength, and the void distribution of formation is inhomogeneous, and too hard, and the film snappiness that the result forms is poor.For example at English Patent G.B.2, in 151,538, proposed to make the nonmiscibility material with barium sulfate, improve above-mentioned problem.But, owing to adopt barium sulfate easily because of its gathering causes the screen plugging of forcing machine, and shortened screen life-span, also can cause tension fracture because of its gathering; Therefore, from the angle of stably manufactured, this method remains unsafty.Here said screen life-span will be explained in example.
The purpose of this invention is to provide a kind of resin combination, when making porous-film, screen life-span is extended to reach 200 hours or longer, and be unlikely to cause tension fracture, like this, can stably produce porous-film in apparent good order and condition with it.
Another object of the present invention provides the porous-film that the resin combination above a kind of usefulness is made.
First aspect of the present invention is a kind of resin combination, it contains the polyolefin resin of 100 parts by weight, and the barium sulfate of 50-500 parts by weight, the latter's specific conductivity is equal to or less than 250(μ s/cm) (specific conductivity that adds the supernatant liquid that forms in the entry with this barium sulfate is represented), particle size is the 0.1-7 micron.
Second aspect of the present invention is a kind of resin combination fusion post-treatment film forming, this resin combination contains the polyolefin resin of 100 parts by weight and the barium sulfate of 50 to 500 parts by weight, the latter's specific conductivity is equal to or less than 250 μ s/cm(and represents with the specific conductivity that this barium sulfate adds the supernatant liquid that forms in the entry), particle size is 0.1 to 7 micron.Again with this film at least uniaxial extension to the 2.5-14 of original area doubly make a kind of porous-film.
The example of polyolefin resin of the present invention has new LDPE (film grade), high density polyethylene(HDPE), linear low density polyethylene, homopolymer, ethylene-propylene copolymer, ethylene-butene copolymer, ethylene-vinyl acetate copolymer or their blend of propylene, butylene etc.
Barium sulfate of the present invention, its specific conductivity are equal to or less than 250(μ s/cm), preferably be equal to or less than 100(μ s/cm), the specific conductivity of barium sulfate is more little, and its effect is good more.If specific conductivity is higher than 250(μ s/cm) because barium sulfate is assembled, screen life-span is shortened, tension fracture usually takes place, this makes to produce and becomes extremely unstable.In addition, the average particle size particle size of barium sulfate should be at the 0.1-7 micrometer range, preferably the 0.5-5.0 micron.If average particle size particle size is lower than 0.1 micron, then can not obtain satisfied porousness, and if particle size greater than 7.0 microns, just that the stretchiness of film can become is very poor, like this, also be difficult to obtain satisfied porousness.In addition, the too high barium sulfate of specific conductivity can also wash with water, or carries out part neutralization washing then with acid or alkali, thereby specific conductivity is reduced to numerical value given to this invention, and then brings use.
In the resin combination of the present invention, the barium sulfate of sneaking into is benchmark with the polyolefin resin of 100 parts by weight, and its amount ranges is the 50-500 parts by weight, and serves as better with 100 to 400 weight parts.
If the barium sulfate consumption is less than 50 parts by weight, then can not obtain satisfied porousness, if the barium sulfate consumption is higher than 500 parts by weight, then the hardness of film increases, like this, just film can not be stretched fully, the porosity of film descends.
Specific conductivity refers to the numerical value that records with following method: 10 gram barium sulfate are added in 100 ml pure waters, and then 100 ℃ of heating 10 minutes, resulting supernatant liquid is measured with conductivity meter in the cooling back.
Here the barium sulfate particle size of addressing is with recording for the instrument (Shimadzu Corp's manufacturing) of measuring the long-pending usefulness of powder surface.
In addition, in order to improve the dispersiveness of barium sulfate in resin, and improve the stretchiness of film, with barium sulfate silicon, it is effective that silane, resinous acid etc. carry out surface treatment.
For example, porous of the present invention crack film can be produced as follows out:
Adopt the Henschel mixing machine, homogenizer, or tumbler mixer are sneaked into other additive commonly used in said polyolefins resin and the barium sulfate in case of necessity.Compound is mediated with single screw rod or twin screw extruder, and kneaded material is through granulation, with inflation mould machine or T shape head die molding machine film extrusion.Above-mentioned kneaded material can be without granulation with the direct film extrusion of forcing machine.
The film of extruding then according to a conventional method at least uniaxial extension and serve as better to the 2.5-14 of original area doubly with 3 to 10 times.Stretching can be carried out stage by stage, perhaps can stretch at biaxially oriented or other direction.In addition, in order to improve the shape stability in hole, film can carry out heat setting type after stretching.
The porosity of film depends on consumption, the particle size of used barium sulfate, and the stretch ratio of film etc. if stretch ratio is lower than 2.5 times, then can not reach enough porositys, if stretch ratio surpasses 14 times, just produces tension fracture, can not guarantee stably manufactured.
Porous-film of the present invention can be used for various practical uses.But, because porosity can change to some extent with practical use, therefore, preferably suitably select stretch ratio.
Adopt permeable steam described below that the porosity of porous-film is described.
The present invention will be described in more detail with the following examples
Embodiment 1～13 and comparative example 1～6
Adopt the Henschel mixing machine, with the various resins shown in the table 1 with barium sulfate in the ratio batch mixes shown in the table 1, used barium sulfate has different specific conductivity and the average particle size particle size shown in the table 1.Subsequently, with the twin screw kneading machine mixture is evenly mediated, the material that obtains is used T shape head forcing machine fusion pellet again through granulation, is processed into film, and according to roll-in method, film is stretched to the draw ratio shown in the table 1.Obtain having the film of physical properties shown in the table 1.
In addition, according to following method, the physical properties of film is estimated:
(1) permeable steam: ASTME96-66 test method D.
(2) screen life-span: when 115 millimeters forcing machines processing film forming of 150 eye mesh screens were housed, the extrusion capacity of resin combination was 200 kilograms/hour, until resin pressure from 230 kilograms per centimeter 2Rising reaches 300 kilograms per centimeter 2In the time limit of Shi Suoyong, be referred to herein as screen life-span.
(3) condition of surface: decide according to range estimation.
(4) specific conductivity of barium sulfate:
Claim 10 gram barium sulfate samples, be placed in 200 ml beakers, add 100 ml distilled waters, the record liquid level position, on electricradiator with mixture heating up to 100 ℃, ten minutes, stir simultaneously, add distilled water and make liquid level reach the home position, stir the gained fluid and cover beaker with sight glass, allow liquid cooling, with filter paper it is filtered, filtrate is put into 100 ml beakers, with CM-20E type conductivity meter (metered commodities name, make by Japanese East Asia electric wave company), measure its specific conductivity.
(5) particle size of barium sulfate:
Adopt and measure long-pending instrument (Shimadzu Corp's manufacturing) mensuration of powder surface, that is to say, 3 gram samples are packed into one 2 centimetres 2In * 1 centimetre the sample tube, and under 50 millimeter water column, measure the time of air infiltration (5 milliliters).
According to the present invention, owing to the barium sulfate aggregate that does not almost have in the material as the nonmiscibility material, screen cloth long service life, processing property is improved significantly, and time length running period of forcing machine is very long, and the stretchiness of film is good, consequently, can realize the stably manufactured of porous-film.
In addition, it is very good to obtain condition of surface, the porous-film of outward appearance brilliance.
And, since the present invention can make film stretching up to 10 times, this is former to be inaccessible.Nowadays, the stretch ratio of end-use that just can be by regulate being fit to film with the porosity of appropriate change film, thereby is selected the porous-film that share the most according to practical use.Therefore, this resin combination of the present invention and manufacture method thereof are extremely useful on market.
Table 1
Table 1(is continuous)
The comparative example
Figure 86108393_IMG2
*1 LLDPE: linear low density polyethylene (Mitsubishi *3 PE-PP: ethylene-propylene copolymer (product
Oiling company makes) trade(brand)name JSR-EP,
*2 LDPE: new LDPE (film grade) (manufacturing of Mitsubishi oiling Japan SYnthetic Rubber Co. Ltd)
Company makes)

Claims (1)

1, with a kind of polyolefin resin that contains 100 parts by weight and 50 to 500 parts by weight, specific conductivity is the barium sulfate of 250 μ s/cm or littler (specific conductivity that adds the supernatant liquid that forms in the entry with barium sulfate is represented), particle size is after 0.1 to 7 micron the resin combination fusion, the processing film forming, and on the single shaft direction, film is stretched to 2.5 times to 14 times of original area at least.
CN86108393.8A 1985-12-11 1986-12-10 Resin composition for porous film and film prepared therefrom Expired CN1005847B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP276692/85 1985-12-11
JP60276692A JPS62138541A (en) 1985-12-11 1985-12-11 Resin composition for porous film and film thereof

Publications (2)

Publication Number Publication Date
CN86108393A CN86108393A (en) 1987-07-01
CN1005847B true CN1005847B (en) 1989-11-22

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CN86108393.8A Expired CN1005847B (en) 1985-12-11 1986-12-10 Resin composition for porous film and film prepared therefrom

Country Status (9)

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US (1) US4699733A (en)
EP (1) EP0226179B1 (en)
JP (1) JPS62138541A (en)
KR (1) KR900001378B1 (en)
CN (1) CN1005847B (en)
CA (1) CA1275357C (en)
DE (1) DE3678116D1 (en)
NO (1) NO864914L (en)
NZ (1) NZ218504A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0253667B1 (en) * 1986-07-16 1992-05-20 Sumitomo Chemical Company, Limited Breathable film and process for production of the same
JPS644338A (en) * 1987-06-26 1989-01-09 Tokuyama Soda Kk Manufacture of porous sheet
US4824718A (en) * 1987-12-04 1989-04-25 Minnesota Mining And Manufacturing Company Porous film
US4902553A (en) * 1987-12-04 1990-02-20 Minnesota Mining And Manufacturing Company Disposable products
US5340646A (en) * 1991-04-26 1994-08-23 Mitsui Toatsu Chemicals, Inc. Breathable, hydrolyzable porous film
US5558658A (en) * 1994-11-23 1996-09-24 Kimberly-Clark Corporation Disposable diaper having a humidity transfer area
US5964742A (en) * 1997-09-15 1999-10-12 Kimberly-Clark Worldwide, Inc. Nonwoven bonding patterns producing fabrics with improved strength and abrasion resistance
US6238767B1 (en) 1997-09-15 2001-05-29 Kimberly-Clark Worldwide, Inc. Laminate having improved barrier properties
US6506695B2 (en) 1998-04-21 2003-01-14 Rheinische Kunststoffewerke Gmbh Breathable composite and method therefor
GB2582144B (en) * 2019-03-11 2021-03-10 Graphcore Ltd Execution Unit Comprising Processing Pipeline for Evaluating a Plurality of Types of Functions
GB2582146B (en) 2019-03-11 2021-08-18 Graphcore Ltd Execution Unit for Evaluating Functions Using Newton Raphson Iterations

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1044503A (en) * 1964-03-23 1966-10-05 Grace W R & Co Cold-worked polyolefin compositions
JPS5699242A (en) * 1980-01-10 1981-08-10 Kao Corp Porous sheet and production thereof
US4472328A (en) * 1981-06-09 1984-09-18 Mitsubishi Chemical Industries, Ltd. Process for producing porous film or sheet
AU551948B2 (en) * 1983-12-16 1986-05-15 Mitsui Toatsu Chemicals Inc. Producing porous film

Also Published As

Publication number Publication date
CN86108393A (en) 1987-07-01
NO864914L (en) 1987-06-12
US4699733A (en) 1987-10-13
EP0226179A3 (en) 1988-06-15
KR900001378B1 (en) 1990-03-09
KR870006128A (en) 1987-07-09
NO864914D0 (en) 1986-12-08
DE3678116D1 (en) 1991-04-18
EP0226179B1 (en) 1991-03-13
EP0226179A2 (en) 1987-06-24
NZ218504A (en) 1989-01-27
JPS62138541A (en) 1987-06-22
CA1275357C (en) 1990-10-23

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